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Gd3+ Synergistic Sensitization in Tb3+-Doped LBSO Glasses: Influence of Cluster Dispersion and Energy Transfer on Luminescence and X-ray Detection

Authors: Fazheng Huang; Zhenli Lin; Qingyi Liu; Dongfeng Xue; Yan Yu; Ying Ding; Lingyun Li

DOI: 10.1007/s40843-025-4025-yStatus: Verified Translated Edition
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Key Findings in This Report

• • Optimal Tb3+ single-doping concentration in LBSO is 37%, but co-doping with 20% Gd3+ raises it to 50%, directly demonstrating suppression of concentration quenching and enabling higher activator loading for increased luminescence yield. • • The LBSO:20%Gd3+,50%Tb3+ sample achieves 542 nm emission intensity 2.22 times that of the 37%Tb3+ single-doped sample, indicating a substantial enhancement in photoluminescence output critical for scintillator sensitivity. • • Scintillation efficiency of the optimized glass is 38% relative to BGO, and X-ray imaging resolution exceeds 20 lp mm−1, positioning it as a competitive candidate for high-resolution X-ray detection applications. • • Gd3+-Tb3+ energy transfer efficiency reaches up to 80%, confirming efficient sensitization; combined with cluster dispersion, this dual mechanism provides a design strategy for enhancing luminescence in rare-earth-doped glasses.